Etymologies

ostentatious +‎ -ly (Wiktionary)

Examples

During the House debate on the Ten's contempt citations, Rankin ostentatiously unfurled a CFA petition in support of the Ten and began to read, a performance intended to raise once more the specter of a Jewish-Communist conspiracy in Hollywood and to warn the recalcitrant CFA members that they could be tarred with the same Red brush as the Ten:

Government was in office, with Lord Randolph Churchill as its leader in the House of Commons; and one of the first acts of the new leader was to separate himself ostentatiously from the Irish policy of Lord Spencer and from the policy of coercion in general.

That was why the father, arriving from Berlin, had on his own initiative brought them an English governess; for the English are admitted by their continental friends to excel in this special branch of manners, while their continental enemies charge them with being "ostentatiously" well groomed and dainty.